Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicos administration" (Expand Search), "public administracao" (Expand Search)
"publicoaaos administration" » "publicaoaaos administration" (Expand Search), "publicooaaos administration" (Expand Search), "publicosoaaos administration" (Expand Search), "publicoaaos administracao" (Expand Search)
"publicas administration" » "publicaas administration" (Expand Search), "publicoas administration" (Expand Search), "publicosas administration" (Expand Search), "publicas administracao" (Expand Search), "publica administration" (Expand Search), "publico administration" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("public administration") OR ("publicoaaos administration"))) OR ("publicas administration"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaos administration\"))) OR (\"publicas administration\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaos administration ))) OR ( publicas administration )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaos administration"))) OR ("publicas administration"))*.